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c517d838 1VERSION = 4
5771a8c0 2PATCHLEVEL = 13
55922c9d 3SUBLEVEL = 0
569dbb88 4EXTRAVERSION =
566cf877 5NAME = Fearless Coyote
1da177e4
LT
6
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
a436bb7b
MY
13# o Do not use make's built-in rules and variables
14# (this increases performance and avoids hard-to-debug behaviour);
15# o Look for make include files relative to root of kernel src
16MAKEFLAGS += -rR --include-dir=$(CURDIR)
1da177e4 17
c051346b 18# Avoid funny character set dependencies
06b5dc64 19unexport LC_ALL
c051346b
PA
20LC_COLLATE=C
21LC_NUMERIC=C
07105202 22export LC_COLLATE LC_NUMERIC
c051346b 23
ab7474ea
BP
24# Avoid interference with shell env settings
25unexport GREP_OPTIONS
26
1da177e4
LT
27# We are using a recursive build, so we need to do a little thinking
28# to get the ordering right.
29#
30# Most importantly: sub-Makefiles should only ever modify files in
31# their own directory. If in some directory we have a dependency on
32# a file in another dir (which doesn't happen often, but it's often
33# unavoidable when linking the built-in.o targets which finally
34# turn into vmlinux), we will call a sub make in that other dir, and
35# after that we are sure that everything which is in that other dir
36# is now up to date.
37#
38# The only cases where we need to modify files which have global
39# effects are thus separated out and done before the recursive
40# descending is started. They are now explicitly listed as the
41# prepare rule.
42
066b7ed9
MM
43# Beautify output
44# ---------------------------------------------------------------------------
45#
46# Normally, we echo the whole command before executing it. By making
47# that echo $($(quiet)$(cmd)), we now have the possibility to set
48# $(quiet) to choose other forms of output instead, e.g.
49#
50# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
51# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
52#
53# If $(quiet) is empty, the whole command will be printed.
54# If it is set to "quiet_", only the short version will be printed.
55# If it is set to "silent_", nothing will be printed at all, since
56# the variable $(silent_cmd_cc_o_c) doesn't exist.
57#
58# A simple variant is to prefix commands with $(Q) - that's useful
59# for commands that shall be hidden in non-verbose mode.
60#
61# $(Q)ln $@ :<
62#
63# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
64# If KBUILD_VERBOSE equals 1 then the above command is displayed.
65#
1da177e4
LT
66# To put more focus on warnings, be less verbose as default
67# Use 'make V=1' to see the full commands
68
b8b0618c
CR
69ifeq ("$(origin V)", "command line")
70 KBUILD_VERBOSE = $(V)
1da177e4
LT
71endif
72ifndef KBUILD_VERBOSE
73 KBUILD_VERBOSE = 0
74endif
75
066b7ed9
MM
76ifeq ($(KBUILD_VERBOSE),1)
77 quiet =
78 Q =
79else
80 quiet=quiet_
81 Q = @
82endif
83
84# If the user is running make -s (silent mode), suppress echoing of
85# commands
86
6f0fa58e 87ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
066b7ed9 88 quiet=silent_
e572d088 89 tools_silent=s
066b7ed9 90endif
066b7ed9
MM
91
92export quiet Q KBUILD_VERBOSE
93
1da177e4
LT
94# kbuild supports saving output files in a separate directory.
95# To locate output files in a separate directory two syntaxes are supported.
96# In both cases the working directory must be the root of the kernel src.
97# 1) O=
98# Use "make O=dir/to/store/output/files/"
070b98bf 99#
1da177e4
LT
100# 2) Set KBUILD_OUTPUT
101# Set the environment variable KBUILD_OUTPUT to point to the directory
102# where the output files shall be placed.
103# export KBUILD_OUTPUT=dir/to/store/output/files/
104# make
105#
106# The O= assignment takes precedence over the KBUILD_OUTPUT environment
107# variable.
108
c4e6fff1
C
109# KBUILD_SRC is not intended to be used by the regular user (for now),
110# it is set on invocation of make with KBUILD_OUTPUT or O= specified.
1da177e4
LT
111ifeq ($(KBUILD_SRC),)
112
113# OK, Make called in directory where kernel src resides
114# Do we want to locate output files in a separate directory?
b8b0618c
CR
115ifeq ("$(origin O)", "command line")
116 KBUILD_OUTPUT := $(O)
1da177e4
LT
117endif
118
119# That's our default target when none is given on the command line
4f193362 120PHONY := _all
1da177e4
LT
121_all:
122
1cacc9ab
SR
123# Cancel implicit rules on top Makefile
124$(CURDIR)/Makefile Makefile: ;
125
51193b76
RJ
126ifneq ($(words $(subst :, ,$(CURDIR))), 1)
127 $(error main directory cannot contain spaces nor colons)
128endif
129
1da177e4 130ifneq ($(KBUILD_OUTPUT),)
1da177e4
LT
131# check that the output directory actually exists
132saved-output := $(KBUILD_OUTPUT)
1c9e70a5
MY
133KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
134 && /bin/pwd)
1da177e4 135$(if $(KBUILD_OUTPUT),, \
1c9e70a5 136 $(error failed to create output directory "$(saved-output)"))
1da177e4 137
0b35786d
MM
138PHONY += $(MAKECMDGOALS) sub-make
139
1cacc9ab 140$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
16f89098 141 @:
0b35786d 142
c4e6fff1 143# Invoke a second make in the output directory, passing relevant variables
2e8d696b 144sub-make:
745a2543 145 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
aa55c8e2 146 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
1da177e4
LT
147
148# Leave processing to above invocation of make
149skip-makefile := 1
150endif # ifneq ($(KBUILD_OUTPUT),)
151endif # ifeq ($(KBUILD_SRC),)
152
153# We process the rest of the Makefile if this is the final invocation of make
154ifeq ($(skip-makefile),)
155
7ff52571
MY
156# Do not print "Entering directory ...",
157# but we want to display it when entering to the output directory
158# so that IDEs/editors are able to understand relative filenames.
159MAKEFLAGS += --no-print-directory
160
aa55c8e2
MY
161# Call a source code checker (by default, "sparse") as part of the
162# C compilation.
163#
164# Use 'make C=1' to enable checking of only re-compiled files.
165# Use 'make C=2' to enable checking of *all* source files, regardless
166# of whether they are re-compiled or not.
167#
036db11c
C
168# See the file "Documentation/dev-tools/sparse.rst" for more details,
169# including where to get the "sparse" utility.
aa55c8e2
MY
170
171ifeq ("$(origin C)", "command line")
172 KBUILD_CHECKSRC = $(C)
173endif
174ifndef KBUILD_CHECKSRC
175 KBUILD_CHECKSRC = 0
176endif
177
178# Use make M=dir to specify directory of external module to build
179# Old syntax make ... SUBDIRS=$PWD is still supported
180# Setting the environment variable KBUILD_EXTMOD take precedence
181ifdef SUBDIRS
182 KBUILD_EXTMOD ?= $(SUBDIRS)
183endif
184
185ifeq ("$(origin M)", "command line")
186 KBUILD_EXTMOD := $(M)
187endif
188
1da177e4
LT
189# If building an external module we do not care about the all: rule
190# but instead _all depend on modules
4f193362 191PHONY += all
1da177e4
LT
192ifeq ($(KBUILD_EXTMOD),)
193_all: all
194else
195_all: modules
196endif
197
9da0763b
MM
198ifeq ($(KBUILD_SRC),)
199 # building in the source tree
200 srctree := .
201else
202 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
203 # building in a subdirectory of the source tree
204 srctree := ..
205 else
206 srctree := $(KBUILD_SRC)
207 endif
208endif
7e1c0477 209objtree := .
1da177e4
LT
210src := $(srctree)
211obj := $(objtree)
212
0f558c33 213VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4 214
11294235 215export srctree objtree VPATH
1da177e4 216
1da177e4
LT
217# SUBARCH tells the usermode build what the underlying arch is. That is set
218# first, and if a usermode build is happening, the "ARCH=um" on the command
219# line overrides the setting of ARCH below. If a native build is happening,
38385f8f 220# then ARCH is assigned, getting whatever value it gets normally, and
1da177e4
LT
221# SUBARCH is subsequently ignored.
222
ffee0de4
DW
223SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
224 -e s/sun4u/sparc64/ \
1da177e4 225 -e s/arm.*/arm/ -e s/sa110/arm/ \
39990b5e 226 -e s/s390x/s390/ -e s/parisc64/parisc/ \
236b1957 227 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
f1b99392 228 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
1da177e4
LT
229
230# Cross compiling and selecting different set of gcc/bin-utils
231# ---------------------------------------------------------------------------
232#
233# When performing cross compilation for other architectures ARCH shall be set
234# to the target architecture. (See arch/* for the possibilities).
235# ARCH can be set during invocation of make:
236# make ARCH=ia64
237# Another way is to have ARCH set in the environment.
238# The default ARCH is the host where make is executed.
239
240# CROSS_COMPILE specify the prefix used for all executables used
241# during compilation. Only gcc and related bin-utils executables
242# are prefixed with $(CROSS_COMPILE).
243# CROSS_COMPILE can be set on the command line
244# make CROSS_COMPILE=ia64-linux-
245# Alternatively CROSS_COMPILE can be set in the environment.
84336466
RM
246# A third alternative is to store a setting in .config so that plain
247# "make" in the configured kernel build directory always uses that.
1da177e4
LT
248# Default value for CROSS_COMPILE is not to prefix executables
249# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
2331d1a6 250ARCH ?= $(SUBARCH)
84336466 251CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
1da177e4
LT
252
253# Architecture as present in compile.h
6752ed90
TG
254UTS_MACHINE := $(ARCH)
255SRCARCH := $(ARCH)
1da177e4 256
d746d647
SR
257# Additional ARCH settings for x86
258ifeq ($(ARCH),i386)
259 SRCARCH := x86
260endif
261ifeq ($(ARCH),x86_64)
262 SRCARCH := x86
263endif
74b469f2 264
5e538790 265# Additional ARCH settings for sparc
e69f58c0
NK
266ifeq ($(ARCH),sparc32)
267 SRCARCH := sparc
268endif
a439fe51 269ifeq ($(ARCH),sparc64)
5e538790 270 SRCARCH := sparc
a439fe51 271endif
2fb9b1bd 272
3cc000b5
PM
273# Additional ARCH settings for sh
274ifeq ($(ARCH),sh64)
275 SRCARCH := sh
276endif
277
18aecc2b 278# Additional ARCH settings for tile
6738d321
CM
279ifeq ($(ARCH),tilepro)
280 SRCARCH := tile
281endif
18aecc2b
CM
282ifeq ($(ARCH),tilegx)
283 SRCARCH := tile
284endif
285
5e538790
SR
286# Where to locate arch specific headers
287hdr-arch := $(SRCARCH)
288
14cdd3c4 289KCONFIG_CONFIG ?= .config
41263fc6 290export KCONFIG_CONFIG
14cdd3c4 291
1da177e4
LT
292# SHELL used by kbuild
293CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
294 else if [ -x /bin/bash ]; then echo /bin/bash; \
295 else echo sh; fi ; fi)
296
d7f14c66
UKK
297HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS)
298HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS)
299HOST_LFS_LIBS := $(shell getconf LFS_LIBS)
300
070b98bf
SR
301HOSTCC = gcc
302HOSTCXX = g++
d7f14c66
UKK
303HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
304 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
305HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
306HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
307HOST_LOADLIBES := $(HOST_LFS_LIBS)
1da177e4 308
61163efa
BW
309ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
310HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
311 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
312endif
313
070b98bf
SR
314# Decide whether to build built-in, modular, or both.
315# Normally, just do built-in.
1da177e4
LT
316
317KBUILD_MODULES :=
318KBUILD_BUILTIN := 1
319
3fbb43df
MY
320# If we have only "make modules", don't compile built-in objects.
321# When we're building modules with modversions, we need to consider
322# the built-in objects during the descend as well, in order to
323# make sure the checksums are up to date before we record them.
1da177e4
LT
324
325ifeq ($(MAKECMDGOALS),modules)
326 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
327endif
328
3fbb43df
MY
329# If we have "make <whatever> modules", compile modules
330# in addition to whatever we do anyway.
331# Just "make" or "make all" shall build modules as well
1da177e4
LT
332
333ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
334 KBUILD_MODULES := 1
335endif
336
337ifeq ($(MAKECMDGOALS),)
338 KBUILD_MODULES := 1
339endif
340
e579d351 341export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
342export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
343
1cacc9ab 344# We need some generic definitions (do not try to remake the file).
a436bb7b
MY
345scripts/Kbuild.include: ;
346include scripts/Kbuild.include
1da177e4
LT
347
348# Make variables (CC, etc...)
1da177e4
LT
349AS = $(CROSS_COMPILE)as
350LD = $(CROSS_COMPILE)ld
351CC = $(CROSS_COMPILE)gcc
352CPP = $(CC) -E
353AR = $(CROSS_COMPILE)ar
354NM = $(CROSS_COMPILE)nm
355STRIP = $(CROSS_COMPILE)strip
356OBJCOPY = $(CROSS_COMPILE)objcopy
357OBJDUMP = $(CROSS_COMPILE)objdump
358AWK = awk
359GENKSYMS = scripts/genksyms/genksyms
caa27b66 360INSTALLKERNEL := installkernel
1da177e4 361DEPMOD = /sbin/depmod
1da177e4 362PERL = perl
011bf125 363PYTHON = python
1da177e4
LT
364CHECK = sparse
365
80a7d1d9
HE
366CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
367 -Wbitwise -Wno-return-void $(CF)
b36fad65 368NOSTDINC_FLAGS =
6588169d
SR
369CFLAGS_MODULE =
370AFLAGS_MODULE =
371LDFLAGS_MODULE =
1da177e4
LT
372CFLAGS_KERNEL =
373AFLAGS_KERNEL =
b36fad65 374LDFLAGS_vmlinux =
b334e19a 375CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
543c37cb 376CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,)
1da177e4 377
fef4fb4a
LO
378# Prefer linux-backports-modules
379ifneq ($(KBUILD_SRC),)
380ifneq ($(shell if test -e $(KBUILD_OUTPUT)/ubuntu-build; then echo yes; fi),yes)
381UBUNTUINCLUDE := -I/usr/src/linux-headers-lbm-$(KERNELRELEASE)
382endif
383endif
1da177e4 384
abbf1590
DH
385# Use USERINCLUDE when you must reference the UAPI directories only.
386USERINCLUDE := \
387 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
3308b285 388 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
abbf1590 389 -I$(srctree)/include/uapi \
3308b285 390 -I$(objtree)/include/generated/uapi \
abbf1590
DH
391 -include $(srctree)/include/linux/kconfig.h
392
1da177e4
LT
393# Use LINUXINCLUDE when you must reference the include/ directory.
394# Needed to be compatible with the O= option
abbf1590 395LINUXINCLUDE := \
fef4fb4a 396 $(UBUNTUINCLUDE) \
abbf1590 397 -I$(srctree)/arch/$(hdr-arch)/include \
3308b285 398 -I$(objtree)/arch/$(hdr-arch)/include/generated \
abbf1590 399 $(if $(KBUILD_SRC), -I$(srctree)/include) \
f8224f7f
MY
400 -I$(objtree)/include \
401 $(USERINCLUDE)
1da177e4 402
fef4fb4a
LO
403# UBUNTU: Include our third party driver stuff too
404LINUXINCLUDE += -Iubuntu/include $(if $(KBUILD_SRC),-I$(srctree)/ubuntu/include)
405
d8672b40 406KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 407
a0f97e06 408KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
8c97023c 409 -fno-strict-aliasing -fno-common -fshort-wchar \
a8735821 410 -Werror-implicit-function-declaration \
51b97e35 411 -Wno-format-security \
c6a38553
BP
412 -std=gnu89 $(call cc-option,-fno-PIE)
413
a1c48bb1 414
80c00ba9
SR
415KBUILD_AFLAGS_KERNEL :=
416KBUILD_CFLAGS_KERNEL :=
c6a38553 417KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
6588169d
SR
418KBUILD_AFLAGS_MODULE := -DMODULE
419KBUILD_CFLAGS_MODULE := -DMODULE
420KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
1da177e4 421
f1d28fb0
RZ
422# Read KERNELRELEASE from include/config/kernel.release (if it exists)
423KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
cacd54ef 424KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
cb58455c 425
070b98bf 426export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 427export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
d7f14c66 428export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
011bf125 429export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
070b98bf 430export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 431
06c5040c 432export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
5c9a8750 433export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
222d394d 434export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
6588169d 435export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
80c00ba9 436export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
40df759e 437export KBUILD_ARFLAGS
1da177e4
LT
438
439# When compiling out-of-tree modules, put MODVERDIR in the module
440# tree rather than in the kernel tree. The kernel tree might
441# even be read-only.
442export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
443
1da177e4
LT
444# Files to ignore in find ... statements
445
ae63b2d7
PB
446export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
447 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
448 -prune -o
450c6076
JJ
449export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
450 --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
451
452# ===========================================================================
453# Rules shared between *config targets and build targets
454
312a3d09 455# Basic helpers built in scripts/basic/
4f193362 456PHONY += scripts_basic
1da177e4
LT
457scripts_basic:
458 $(Q)$(MAKE) $(build)=scripts/basic
638adb05 459 $(Q)rm -f .tmp_quiet_recordmcount
1da177e4 460
cd05e6bd
JB
461# To avoid any implicit rule to kick in, define an empty command.
462scripts/basic/%: scripts_basic ;
463
4f193362 464PHONY += outputmakefile
fd5f0cd6
JB
465# outputmakefile generates a Makefile in the output directory, if using a
466# separate output directory. This allows convenient use of make in the
467# output directory.
1da177e4 468outputmakefile:
fd5f0cd6 469ifneq ($(KBUILD_SRC),)
92979997 470 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
471 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
472 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
473endif
1da177e4 474
d8ecc5cd 475# Support for using generic headers in asm-generic
a9d9a400
MY
476PHONY += asm-generic uapi-asm-generic
477asm-generic: uapi-asm-generic
d8ecc5cd 478 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
3c5994c8 479 src=asm obj=arch/$(SRCARCH)/include/generated/asm
a9d9a400 480uapi-asm-generic:
3c5994c8
CM
481 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
482 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
d8ecc5cd 483
1da177e4
LT
484# To make sure we do not include .config for any of the *config targets
485# catch them early, and hand them over to scripts/kconfig/Makefile
486# It is allowed to specify more targets when calling make, including
487# mixing *config targets and build targets.
070b98bf 488# For example 'make oldconfig all'.
1da177e4
LT
489# Detect when mixed targets is specified, and make a second invocation
490# of make so .config is not included in this case either (for *config).
491
10b63956 492version_h := include/generated/uapi/linux/version.h
223c24a7 493old_version_h := include/linux/version.h
d183e6f5 494
3eb3c740 495no-dot-config-targets := clean mrproper distclean \
fbae4d58 496 cscope gtags TAGS tags help% %docs check% coccicheck \
d183e6f5 497 $(version_h) headers_% archheaders archscripts \
4aed2fd8 498 kernelversion %src-pkg
1da177e4
LT
499
500config-targets := 0
501mixed-targets := 0
502dot-config := 1
503
504ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
505 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
506 dot-config := 0
507 endif
508endif
509
510ifeq ($(KBUILD_EXTMOD),)
511 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
512 config-targets := 1
d0d38cd9 513 ifneq ($(words $(MAKECMDGOALS)),1)
1da177e4
LT
514 mixed-targets := 1
515 endif
516 endif
517endif
312a3d09 518# install and modules_install need also be processed one by one
a85a41ed
MM
519ifneq ($(filter install,$(MAKECMDGOALS)),)
520 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
521 mixed-targets := 1
522 endif
523endif
1da177e4
LT
524
525ifeq ($(mixed-targets),1)
526# ===========================================================================
527# We're called with mixed targets (*config and build targets).
528# Handle them one by one.
529
9319f453
MY
530PHONY += $(MAKECMDGOALS) __build_one_by_one
531
532$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
533 @:
534
535__build_one_by_one:
536 $(Q)set -e; \
537 for i in $(MAKECMDGOALS); do \
538 $(MAKE) -f $(srctree)/Makefile $$i; \
539 done
1da177e4
LT
540
541else
542ifeq ($(config-targets),1)
543# ===========================================================================
544# *config targets only - make sure prerequisites are updated, and descend
545# in scripts/kconfig to make the *config target
546
547# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
548# KBUILD_DEFCONFIG may point out an alternative default configuration
549# used for 'make defconfig'
a436bb7b 550include arch/$(SRCARCH)/Makefile
61bee204 551export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 552
31110ebb 553config: scripts_basic outputmakefile FORCE
31110ebb
SR
554 $(Q)$(MAKE) $(build)=scripts/kconfig $@
555
556%config: scripts_basic outputmakefile FORCE
1da177e4
LT
557 $(Q)$(MAKE) $(build)=scripts/kconfig $@
558
559else
560# ===========================================================================
561# Build targets only - this includes vmlinux, arch specific targets, clean
562# targets and others. In general all targets except *config targets.
563
564ifeq ($(KBUILD_EXTMOD),)
565# Additional helpers built in scripts/
566# Carefully list dependencies so we do not try to build scripts twice
070b98bf 567# in parallel
4f193362 568PHONY += scripts
a54292f5 569scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
6b90bd4b 570 asm-generic gcc-plugins
1da177e4
LT
571 $(Q)$(MAKE) $(build)=$(@)
572
1da177e4
LT
573# Objects we will link into vmlinux / subdirs we need to visit
574init-y := init/
fef4fb4a 575drivers-y := drivers/ sound/ firmware/ ubuntu/
1da177e4
LT
576net-y := net/
577libs-y := lib/
578core-y := usr/
37d9fe47 579virt-y := virt/
1da177e4
LT
580endif # KBUILD_EXTMOD
581
582ifeq ($(dot-config),1)
9ee4e336
SR
583# Read in config
584-include include/config/auto.conf
1da177e4 585
9ee4e336 586ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
587# Read in dependencies to all Kconfig* files, make sure to run
588# oldconfig if changes are detected.
c955ccaf 589-include include/config/auto.conf.cmd
1da177e4 590
1da177e4 591# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 592$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 593
c955ccaf 594# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 595# with it and forgot to run make oldconfig.
070b98bf 596# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 597# we execute the config step to be sure to catch updated Kconfig files
bc081dd6 598include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 599 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 600else
264a2683 601# external modules needs include/generated/autoconf.h and include/config/auto.conf
9ee4e336
SR
602# but do not care if they are up-to-date. Use auto.conf to trigger the test
603PHONY += include/config/auto.conf
604
605include/config/auto.conf:
264a2683 606 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
5369f550
MM
607 echo >&2; \
608 echo >&2 " ERROR: Kernel configuration is invalid."; \
609 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
610 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
611 echo >&2 ; \
9ee4e336
SR
612 /bin/false)
613
614endif # KBUILD_EXTMOD
c955ccaf 615
1da177e4
LT
616else
617# Dummy target needed, because used as prerequisite
c955ccaf 618include/config/auto.conf: ;
9ee4e336 619endif # $(dot-config)
1da177e4 620
86556392
NP
621# For the kernel to actually contain only the needed exported symbols,
622# we have to build modules as well to determine what those symbols are.
623# (this can be evaluated only once include/config/auto.conf has been included)
624ifdef CONFIG_TRIM_UNUSED_KSYMS
625 KBUILD_MODULES := 1
626endif
627
1da177e4
LT
628# The all: target is the default when no target is given on the
629# command line.
630# This allow a user to issue only 'make' to build a kernel including modules
c8447161 631# Defaults to vmlinux, but the arch makefile usually adds further targets
1da177e4
LT
632all: vmlinux
633
6dd3f13e
MM
634# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
635# values of the respective KBUILD_* variables
636ARCH_CPPFLAGS :=
637ARCH_AFLAGS :=
638ARCH_CFLAGS :=
a436bb7b 639include arch/$(SRCARCH)/Makefile
a1c48bb1
GU
640
641KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
ef6000b4 642KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
bd664f6b
LT
643KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
644KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
645KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
a1c48bb1 646
1da177e4 647ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
6748cb3c
BW
648KBUILD_CFLAGS += $(call cc-option,-Oz,-Os)
649KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
1da177e4 650else
815eb71e 651ifdef CONFIG_PROFILE_ALL_BRANCHES
a76bcf55 652KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
815eb71e
AB
653else
654KBUILD_CFLAGS += -O2
655endif
1da177e4
LT
656endif
657
a76bcf55
AB
658KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
659 $(call cc-disable-warning,maybe-uninitialized,))
660
69102311
JK
661# Tell gcc to never replace conditional load with a non-conditional one
662KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
663
7292ae3d
GFM
664# check for 'asm goto'
665ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
666 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
667 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
668endif
669
6b90bd4b
ER
670include scripts/Makefile.gcc-plugins
671
1873e870
AK
672ifdef CONFIG_READABLE_ASM
673# Disable optimizations that make assembler listings hard to read.
674# reorder blocks reorders the control in the function
675# ipa clone creates specialized cloned functions
676# partial inlining inlines only parts of functions
677KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
678 $(call cc-option,-fno-ipa-cp-clone,) \
679 $(call cc-option,-fno-partial-inlining)
680endif
681
08f67461 682ifneq ($(CONFIG_FRAME_WARN),0)
35bb5b1e
AK
683KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
684endif
685
c965b105
KC
686# This selects the stack protector compiler flag. Testing it is delayed
687# until after .config has been reprocessed, in the prepare-compiler-check
688# target.
8779657d 689ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
19952a92 690 stackp-flag := -fstack-protector
c965b105 691 stackp-name := REGULAR
6c15b327
JB
692else
693ifdef CONFIG_CC_STACKPROTECTOR_STRONG
8779657d 694 stackp-flag := -fstack-protector-strong
c965b105 695 stackp-name := STRONG
19952a92
KC
696else
697 # Force off for distro compilers that enable stack protector by default.
698 stackp-flag := $(call cc-option, -fno-stack-protector)
5d707e9c 699endif
6c15b327 700endif
c965b105
KC
701# Find arch-specific stack protector compiler sanity-checking script.
702ifdef CONFIG_CC_STACKPROTECTOR
228d96c6
KC
703 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
704 stackp-check := $(wildcard $(stackp-path))
c965b105 705endif
19952a92 706KBUILD_CFLAGS += $(stackp-flag)
e06b8b98 707
5631d9c4 708ifeq ($(cc-name),clang)
785f11aa
BW
709ifneq ($(CROSS_COMPILE),)
710CLANG_TARGET := -target $(notdir $(CROSS_COMPILE:%-=%))
711GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..)
712endif
713ifneq ($(GCC_TOOLCHAIN),)
714CLANG_GCC_TC := -gcc-toolchain $(GCC_TOOLCHAIN)
715endif
716KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
717KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
61163efa 718KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
61163efa
BW
719KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
720KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
721KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
bfb38988 722KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
61163efa
BW
723# Quiet clang warning: comparison of unsigned expression < 0 is always false
724KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
725# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
726# source of a reference will be _MergedGlobals and not on of the whitelisted names.
727# See modpost pattern 2
728KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
26ea6bb1 729KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
a37c45cd
MD
730KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
731KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
61163efa
BW
732else
733
c9c6837d 734# These warnings generated too much noise in a regular build.
35288e30 735# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
8417da6f 736KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
c9c6837d 737KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
61163efa 738endif
af0e5d56 739
1da177e4 740ifdef CONFIG_FRAME_POINTER
a0f97e06 741KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 742else
7e9501fd
RV
743# Some targets (ARM with Thumb2, for example), can't be built with frame
744# pointers. For those, we don't have FUNCTION_TRACER automatically
745# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
746# incompatible with -fomit-frame-pointer with current GCC, so we don't use
747# -fomit-frame-pointer with FUNCTION_TRACER.
748ifndef CONFIG_FUNCTION_TRACER
a0f97e06 749KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4 750endif
7e9501fd 751endif
1da177e4 752
2062afb4
LT
753KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
754
1da177e4 755ifdef CONFIG_DEBUG_INFO
866ced95
AK
756ifdef CONFIG_DEBUG_INFO_SPLIT
757KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
758else
a0f97e06 759KBUILD_CFLAGS += -g
866ced95 760endif
2288328c 761KBUILD_AFLAGS += -Wa,-gdwarf-2
1da177e4 762endif
bfaf2dd3
AK
763ifdef CONFIG_DEBUG_INFO_DWARF4
764KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
765endif
1da177e4 766
d6f4ceb7 767ifdef CONFIG_DEBUG_INFO_REDUCED
e82c4bb8
AK
768KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
769 $(call cc-option,-fno-var-tracking)
d6f4ceb7
AK
770endif
771
606576ce 772ifdef CONFIG_FUNCTION_TRACER
c0a80c0c
HC
773ifndef CC_FLAGS_FTRACE
774CC_FLAGS_FTRACE := -pg
775endif
776export CC_FLAGS_FTRACE
a2546fae
SR
777ifdef CONFIG_HAVE_FENTRY
778CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
779endif
c0a80c0c 780KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
a2546fae 781KBUILD_AFLAGS += $(CC_USING_FENTRY)
72441cb1 782ifdef CONFIG_DYNAMIC_FTRACE
cf4db259 783 ifdef CONFIG_HAVE_C_RECORDMCOUNT
72441cb1
SR
784 BUILD_C_RECORDMCOUNT := y
785 export BUILD_C_RECORDMCOUNT
786 endif
787endif
16444a8a
ACM
788endif
789
91341d4b
SR
790# We trigger additional mismatches with less inlining
791ifdef CONFIG_DEBUG_SECTION_MISMATCH
792KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
793endif
794
90ad4052
MY
795ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
796KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,)
797KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
798endif
799
e8e69931 800# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 801NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
802CHECKFLAGS += $(NOSTDINC_FLAGS)
803
1da177e4 804# warn about C99 declaration after statement
a0f97e06 805KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 806
070b98bf 807# disable pointer signed / unsigned warnings in gcc 4.0
8417da6f 808KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
1da177e4 809
fe8d0a41 810# disable invalid "can't wrap" optimizations for signed / pointers
a137802e 811KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
d0115552 812
8f7f5c9f
AK
813# conserve stack if available
814KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
815
80970472
ST
816# disallow errors like 'EXPORT_GPL(foo);' with missing header
817KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
818
819# require functions to have arguments in prototypes, not empty 'int foo()'
820KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
821
fe7c36c7
JT
822# Prohibit date/time macros, which would make the build non-deterministic
823KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
824
ea8daa7b
DW
825# enforce correct pointer usage
826KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
827
c834f0e8
KC
828# Require designated initializers for all marked structures
829KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
830
40df759e
MM
831# use the deterministic mode of AR if available
832KBUILD_ARFLAGS := $(call ar-option,D)
833
a436bb7b
MY
834include scripts/Makefile.kasan
835include scripts/Makefile.extrawarn
c6d30853 836include scripts/Makefile.ubsan
a86fe353 837
61754c18
MM
838# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
839# last assignments
840KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
841KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
842KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
52bcc330 843
18991197 844# Use --build-id when available.
bd74370b 845LDFLAGS_BUILD_ID := $(patsubst -Wl$(comma)%,%,\
f86fd306 846 $(call cc-ldoption, -Wl$(comma)--build-id,))
6588169d 847KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
18991197
RM
848LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
849
b67067f1
NP
850ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
851LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
852endif
853
5d7d18f5 854ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
d79a2719 855LDFLAGS_vmlinux += $(call ld-option, -X,)
5d7d18f5
DH
856endif
857
1da177e4 858# Default kernel image to build when no specific target is given.
070b98bf 859# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
860# set in the environment
861# Also any assignments in arch/$(ARCH)/Makefile take precedence over
862# this default value
863export KBUILD_IMAGE ?= vmlinux
864
865#
866# INSTALL_PATH specifies where to place the updated kernel and system map
867# images. Default is /boot, but you can set it to other values
868export INSTALL_PATH ?= /boot
869
f4d4ffc0
JC
870#
871# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
872# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
873# an argument if needed. Otherwise it defaults to the kernel install path
874#
875export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
876
1da177e4
LT
877#
878# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
879# relocations required by build roots. This is not defined in the
070b98bf 880# makefile but the argument can be passed to make if needed.
1da177e4
LT
881#
882
df9df036 883MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
884export MODLIB
885
ac031f26 886#
3fbb43df
MY
887# INSTALL_MOD_STRIP, if defined, will cause modules to be
888# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
889# the default option --strip-debug will be used. Otherwise,
890# INSTALL_MOD_STRIP value will be used as the options to the strip command.
2ea03891 891
ac031f26
TT
892ifdef INSTALL_MOD_STRIP
893ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 894mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 895else
2ea03891 896mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
897endif # INSTALL_MOD_STRIP=1
898else
2ea03891 899mod_strip_cmd = true
ac031f26
TT
900endif # INSTALL_MOD_STRIP
901export mod_strip_cmd
902
beb50df3
BJ
903# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
904# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
905# or CONFIG_MODULE_COMPRESS_XZ.
906
907mod_compress_cmd = true
908ifdef CONFIG_MODULE_COMPRESS
909 ifdef CONFIG_MODULE_COMPRESS_GZIP
3d1450d5 910 mod_compress_cmd = gzip -n -f
beb50df3
BJ
911 endif # CONFIG_MODULE_COMPRESS_GZIP
912 ifdef CONFIG_MODULE_COMPRESS_XZ
3d1450d5 913 mod_compress_cmd = xz -f
beb50df3
BJ
914 endif # CONFIG_MODULE_COMPRESS_XZ
915endif # CONFIG_MODULE_COMPRESS
916export mod_compress_cmd
917
1bf49dd4 918# Select initial ramdisk compression format, default is gzip(1).
919# This shall be used by the dracut(8) tool while creating an initramfs image.
920#
7ac18156
JB
921INITRD_COMPRESS-y := gzip
922INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
923INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
924INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
925INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
926INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
b7000ade
LT
927# do not export INITRD_COMPRESS, since we didn't actually
928# choose a sane default compression above.
929# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1da177e4 930
d9d8d7ed 931ifdef CONFIG_MODULE_SIG_ALL
3ee550f1
DW
932$(eval $(call config_filename,MODULE_SIG_KEY))
933
934mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
e2a666d5
RR
935else
936mod_sign_cmd = true
937endif
938export mod_sign_cmd
939
9f0c18ae
JP
940ifdef CONFIG_STACK_VALIDATION
941 has_libelf := $(call try-run,\
942 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
943 ifeq ($(has_libelf),1)
944 objtool_target := tools/objtool FORCE
945 else
946 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
947 SKIP_STACK_VALIDATION := 1
948 export SKIP_STACK_VALIDATION
949 endif
950endif
951
e2a666d5 952
1da177e4 953ifeq ($(KBUILD_EXTMOD),)
cfc411e7 954core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
955
956vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
957 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
37d9fe47 958 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
1da177e4
LT
959
960vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
37d9fe47 961 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
1da177e4
LT
962
963init-y := $(patsubst %/, %/built-in.o, $(init-y))
964core-y := $(patsubst %/, %/built-in.o, $(core-y))
965drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
966net-y := $(patsubst %/, %/built-in.o, $(net-y))
967libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
3a166fc2 968libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y)))
37d9fe47 969virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
1da177e4 970
1f2bfbd0 971# Externally visible symbols (used by link-vmlinux.sh)
95698570 972export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
3a166fc2
NP
973export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
974export KBUILD_VMLINUX_LIBS := $(libs-y1)
95698570 975export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1f2bfbd0 976export LDFLAGS_vmlinux
312a3d09 977# used by scripts/package/Makefile
37d9fe47 978export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
9bb48247 979
3a166fc2 980vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
1da177e4 981
2441e78b
NP
982# Include targets which we want to execute sequentially if the rest of the
983# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
984# evaluated more than once.
985PHONY += vmlinux_prereq
986vmlinux_prereq: $(vmlinux-deps) FORCE
0f836e5f 987ifdef CONFIG_HEADERS_CHECK
0e7af8d0 988 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025 989endif
3ee7b3fa
JK
990ifdef CONFIG_GDB_SCRIPTS
991 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
0f836e5f 992endif
2441e78b 993ifdef CONFIG_TRIM_UNUSED_KSYMS
ba79d401 994 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
86556392 995 "$(MAKE) -f $(srctree)/Makefile vmlinux"
2441e78b 996endif
23121ca2
NP
997
998# standalone target for easier testing
999include/generated/autoksyms.h: FORCE
ba79d401 1000 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
23121ca2 1001
fbe6e37d
NP
1002ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1003
1004# Final link of vmlinux with optional arch pass after final link
312a3d09
C
1005cmd_link-vmlinux = \
1006 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \
fbe6e37d 1007 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
2441e78b 1008
edf69470 1009vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
1f2bfbd0 1010 +$(call if_changed,link-vmlinux)
741f98fe 1011
dd92478a
NP
1012# Build samples along the rest of the kernel
1013ifdef CONFIG_SAMPLES
1014vmlinux-dirs += samples
1015endif
1016
38385f8f 1017# The actual objects are generated when descending,
1da177e4 1018# make sure no implicit rule kicks in
1f2bfbd0 1019$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1da177e4
LT
1020
1021# Handle descending into subdirectories listed in $(vmlinux-dirs)
1022# Preset locale variables to speed up the build process. Limit locale
1023# tweaks to this spot to avoid wrong language settings when running
1024# make menuconfig etc.
1025# Error messages still appears in the original language
1026
4f193362 1027PHONY += $(vmlinux-dirs)
5bb78269 1028$(vmlinux-dirs): prepare scripts
1da177e4
LT
1029 $(Q)$(MAKE) $(build)=$@
1030
0d0e7718
MM
1031define filechk_kernel.release
1032 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1033endef
1034
83a35e36 1035# Store (new) KERNELRELEASE string in include/config/kernel.release
f1d28fb0 1036include/config/kernel.release: include/config/auto.conf FORCE
0d0e7718 1037 $(call filechk,kernel.release)
cb58455c
SR
1038
1039
1da177e4 1040# Things we need to do before we recursively start building the kernel
5bb78269
SR
1041# or the modules are listed in "prepare".
1042# A multi level approach is used. prepareN is processed before prepareN-1.
1043# archprepare is used in arch Makefiles and when processed asm symlink,
1044# version.h and scripts_basic is processed / created.
1da177e4 1045
5bb78269 1046# Listed in dependency order
4f193362 1047PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 1048
86feeaa8 1049# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
1050# and if so do:
1051# 1) Check that make has not been executed in the kernel src $(srctree)
f1d28fb0 1052prepare3: include/config/kernel.release
1da177e4 1053ifneq ($(KBUILD_SRC),)
fd54f502 1054 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 1055 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
5369f550
MM
1056 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1057 echo >&2 " in the '$(srctree)' directory.";\
1da177e4
LT
1058 /bin/false; \
1059 fi;
1da177e4
LT
1060endif
1061
c965b105
KC
1062# prepare2 creates a makefile if using a separate output directory.
1063# From this point forward, .config has been reprocessed, so any rules
1064# that need to depend on updated CONFIG_* values can be checked here.
1065prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
1da177e4 1066
d183e6f5 1067prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
f7f16b77 1068 include/config/auto.conf
7bb9d092 1069 $(cmd_crmodverdir)
1da177e4 1070
6520fe55 1071archprepare: archheaders archscripts prepare1 scripts_basic
5bb78269 1072
6b90bd4b 1073prepare0: archprepare gcc-plugins
8d36a623 1074 $(Q)$(MAKE) $(build)=.
86feeaa8 1075
1da177e4 1076# All the preparing..
b9ab5ebb
JP
1077prepare: prepare0 prepare-objtool
1078
1079PHONY += prepare-objtool
3b27a0c8 1080prepare-objtool: $(objtool_target)
1da177e4 1081
c965b105
KC
1082# Check for CONFIG flags that require compiler support. Abort the build
1083# after .config has been processed, but before the kernel build starts.
1084#
1085# For security-sensitive CONFIG options, we don't want to fallback and/or
1086# silently change which compiler flags will be used, since that leads to
1087# producing kernels with different security feature characteristics
1088# depending on the compiler used. (For example, "But I selected
1089# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1090PHONY += prepare-compiler-check
1091prepare-compiler-check: FORCE
1092# Make sure compiler supports requested stack protector flag.
1093ifdef stackp-name
1094 ifeq ($(call cc-option, $(stackp-flag)),)
1095 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1096 $(stackp-flag) not supported by compiler >&2 && exit 1
1097 endif
1098endif
1099# Make sure compiler does not have buggy stack-protector support.
1100ifdef stackp-check
1101 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
1102 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1103 $(stackp-flag) available but compiler is broken >&2 && exit 1
1104 endif
1105endif
1106 @:
1107
1da177e4
LT
1108# Generate some files
1109# ---------------------------------------------------------------------------
1110
1111# KERNELRELEASE can change from a few different places, meaning version.h
1112# needs to be updated, so this check is forced on all builds
1113
1114uts_len := 64
63104eec
SR
1115define filechk_utsrelease.h
1116 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1117 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1118 exit 1; \
1119 fi; \
1120 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1121endef
1da177e4
LT
1122
1123define filechk_version.h
450c6076
JJ
1124 (echo \#define LINUX_VERSION_CODE $(shell \
1125 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
63104eec 1126 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
1127endef
1128
d183e6f5 1129$(version_h): $(srctree)/Makefile FORCE
1da177e4 1130 $(call filechk,version.h)
223c24a7 1131 $(Q)rm -f $(old_version_h)
1da177e4 1132
273b281f 1133include/generated/utsrelease.h: include/config/kernel.release FORCE
63104eec
SR
1134 $(call filechk,utsrelease.h)
1135
179efcb4
VN
1136PHONY += headerdep
1137headerdep:
9663d989
PF
1138 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1139 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
179efcb4 1140
88ecf814
DW
1141# ---------------------------------------------------------------------------
1142# Firmware install
1143INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1144export INSTALL_FW_PATH
1145
1146PHONY += firmware_install
2e8d696b 1147firmware_install:
88ecf814
DW
1148 @mkdir -p $(objtree)/firmware
1149 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1150
8d730cfb
DW
1151# ---------------------------------------------------------------------------
1152# Kernel headers
8d730cfb 1153
e6883b18
SR
1154#Default location for installed headers
1155export INSTALL_HDR_PATH = $(objtree)/usr
6d716275 1156
0f042eea 1157# If we do an all arch process set dst to include/arch-$(hdr-arch)
61562f98 1158hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(hdr-arch), dst=include)
e6883b18 1159
052ad274
PA
1160PHONY += archheaders
1161archheaders:
1162
6520fe55
PA
1163PHONY += archscripts
1164archscripts:
1165
e6883b18 1166PHONY += __headers
a9d9a400 1167__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
e1b702cf 1168 $(Q)$(MAKE) $(build)=scripts build_unifdef
e6883b18
SR
1169
1170PHONY += headers_install_all
2fb9b1bd
SR
1171headers_install_all:
1172 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 1173
8d730cfb 1174PHONY += headers_install
e6883b18 1175headers_install: __headers
10b63956
DH
1176 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1177 $(error Headers not exportable for the $(SRCARCH) architecture))
a8ff49a1 1178 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
61562f98 1179 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst)
8d730cfb 1180
1f85712e
MF
1181PHONY += headers_check_all
1182headers_check_all: headers_install_all
2fb9b1bd 1183 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 1184
68475359
DW
1185PHONY += headers_check
1186headers_check: headers_install
a8ff49a1 1187 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
05d8cba4 1188 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst) HDRCHECK=1
68475359 1189
5a5da78b
SK
1190# ---------------------------------------------------------------------------
1191# Kernel selftest
1192
1193PHONY += kselftest
1194kselftest:
1195 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1196
801d2e9f 1197PHONY += kselftest-clean
dcb825a9
WL
1198kselftest-clean:
1199 $(Q)$(MAKE) -C tools/testing/selftests clean
1200
3d6dee7a
BJZ
1201PHONY += kselftest-merge
1202kselftest-merge:
1203 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1204 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1205 -m $(objtree)/.config \
1206 $(srctree)/tools/testing/selftests/*/config
1207 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1208
1da177e4
LT
1209# ---------------------------------------------------------------------------
1210# Modules
1211
1212ifdef CONFIG_MODULES
1213
070b98bf 1214# By default, build modules as well
1da177e4 1215
73d1393e 1216all: modules
1da177e4 1217
3fbb43df 1218# Build modules
551559e1 1219#
3fbb43df
MY
1220# A module can be listed more than once in obj-m resulting in
1221# duplicate lines in modules.order files. Those are removed
1222# using awk while concatenating to the final file.
1da177e4 1223
4f193362 1224PHONY += modules
2da30e70 1225modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
551559e1 1226 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 1227 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1228 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
44463f7d 1229 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1da177e4 1230
a6c36632
MM
1231modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1232 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1233
73d1393e 1234%/modules.builtin: include/config/auto.conf
a6c36632
MM
1235 $(Q)$(MAKE) $(modbuiltin)=$*
1236
1da177e4
LT
1237
1238# Target to prepare building external modules
4f193362 1239PHONY += modules_prepare
5bb78269 1240modules_prepare: prepare scripts
1da177e4
LT
1241
1242# Target to install modules
4f193362 1243PHONY += modules_install
1da177e4
LT
1244modules_install: _modinst_ _modinst_post
1245
4f193362 1246PHONY += _modinst_
2da30e70 1247_modinst_:
1da177e4
LT
1248 @rm -rf $(MODLIB)/kernel
1249 @rm -f $(MODLIB)/source
1250 @mkdir -p $(MODLIB)/kernel
890676c6 1251 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1da177e4
LT
1252 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1253 rm -f $(MODLIB)/build ; \
7e1c0477 1254 ln -s $(CURDIR) $(MODLIB)/build ; \
1da177e4 1255 fi
551559e1 1256 @cp -f $(objtree)/modules.order $(MODLIB)/
bc081dd6 1257 @cp -f $(objtree)/modules.builtin $(MODLIB)/
b805aa0e 1258 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1259
50a8ec31 1260# This depmod is only for convenience to give the initial
1da177e4
LT
1261# boot a modules.dep even before / is mounted read-write. However the
1262# boot script depmod is the master version.
4f193362 1263PHONY += _modinst_post
6d128e1e 1264_modinst_post: _modinst_
88ecf814 1265 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
50a8ec31 1266 $(call cmd,depmod)
1da177e4 1267
d890f510
JB
1268ifeq ($(CONFIG_MODULE_SIG), y)
1269PHONY += modules_sign
1270modules_sign:
1271 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1272endif
1273
1da177e4
LT
1274else # CONFIG_MODULES
1275
1276# Modules not configured
1277# ---------------------------------------------------------------------------
1278
612e47ce
MY
1279PHONY += modules modules_install
1280modules modules_install:
5369f550
MM
1281 @echo >&2
1282 @echo >&2 "The present kernel configuration has modules disabled."
1283 @echo >&2 "Type 'make config' and enable loadable module support."
1284 @echo >&2 "Then build a kernel with module support enabled."
1285 @echo >&2
1da177e4
LT
1286 @exit 1
1287
1288endif # CONFIG_MODULES
1289
1da177e4
LT
1290###
1291# Cleaning is done on three levels.
1292# make clean Delete most generated files
1293# Leave enough to build external modules
1294# make mrproper Delete the current configuration, and all generated files
1295# make distclean Remove editor backup files, patch leftover files and the like
1296
1297# Directories & files removed with 'make clean'
1298CLEAN_DIRS += $(MODVERDIR)
1da177e4
LT
1299
1300# Directories & files removed with 'make mrproper'
d8ecc5cd 1301MRPROPER_DIRS += include/config usr/include include/generated \
3fbb43df 1302 arch/*/include/generated .tmp_objdiff
c22bd32c 1303MRPROPER_FILES += .config .config.old .version .old_version \
d5b71936 1304 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
fb117949
DW
1305 signing_key.pem signing_key.priv signing_key.x509 \
1306 x509.genkey extra_certificates signing_key.x509.keyid \
3ee7b3fa 1307 signing_key.x509.signer vmlinux-gdb.py
1da177e4
LT
1308
1309# clean - Delete most, but leave enough to build external modules
1310#
1311clean: rm-dirs := $(CLEAN_DIRS)
1312clean: rm-files := $(CLEAN_FILES)
fb68d4be 1313clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1da177e4 1314
bd1ee804 1315PHONY += $(clean-dirs) clean archclean vmlinuxclean
1da177e4
LT
1316$(clean-dirs):
1317 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1318
bd1ee804
PM
1319vmlinuxclean:
1320 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
fbe6e37d 1321 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
bd1ee804
PM
1322
1323clean: archclean vmlinuxclean
1da177e4
LT
1324
1325# mrproper - Delete all generated files, including .config
1326#
1327mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1328mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
cb43fb57 1329mrproper-dirs := $(addprefix _mrproper_,scripts)
1da177e4 1330
4f193362 1331PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1332$(mrproper-dirs):
1333 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1334
1335mrproper: clean archmrproper $(mrproper-dirs)
1336 $(call cmd,rmdirs)
1337 $(call cmd,rmfiles)
1338
1339# distclean
1340#
4f193362 1341PHONY += distclean
1da177e4
LT
1342
1343distclean: mrproper
1344 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1345 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
f78271df
MY
1346 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1347 -o -name 'core' \) \
1da177e4
LT
1348 -type f -print | xargs rm -f
1349
1350
1351# Packaging of the kernel to various formats
1352# ---------------------------------------------------------------------------
1353# rpm target kept for backward compatibility
c79624c1 1354package-dir := scripts/package
1da177e4 1355
bafb6747
ACM
1356%src-pkg: FORCE
1357 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1358%pkg: include/config/kernel.release FORCE
6c2133e1 1359 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1360rpm: include/config/kernel.release FORCE
6c2133e1 1361 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1362
1363
1364# Brief documentation of the typical targets used
1365# ---------------------------------------------------------------------------
1366
5dffbe81 1367boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
a1e7b7bb 1368boards := $(sort $(notdir $(boards)))
5dffbe81
SB
1369board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1370board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4 1371
fe69b420 1372PHONY += help
1da177e4
LT
1373help:
1374 @echo 'Cleaning targets:'
5ea084ef 1375 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1376 @echo ' enough build support to build external modules'
5ea084ef 1377 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1378 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1379 @echo ''
1380 @echo 'Configuration targets:'
1381 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1382 @echo ''
1383 @echo 'Other generic targets:'
1384 @echo ' all - Build all targets marked with [*]'
1385 @echo '* vmlinux - Build the bare kernel'
1386 @echo '* modules - Build all modules'
9cc5d74c 1387 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
88ecf814
DW
1388 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1389 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1da177e4 1390 @echo ' dir/ - Build all files in dir and below'
40ab87a4 1391 @echo ' dir/file.[ois] - Build specified target only'
433db3e2
VT
1392 @echo ' dir/file.ll - Build the LLVM assembly file'
1393 @echo ' (requires compiler support for LLVM assembly generation)'
62718979
JP
1394 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1395 @echo ' (requires a recent binutils and recent build (System.map))'
155ad605 1396 @echo ' dir/file.ko - Build module including final link'
c4d5ee67 1397 @echo ' modules_prepare - Set up for building external modules'
1da177e4
LT
1398 @echo ' tags/TAGS - Generate tags file for editors'
1399 @echo ' cscope - Generate cscope index'
f4ed1009 1400 @echo ' gtags - Generate GNU GLOBAL index'
3f1d9a6c
MM
1401 @echo ' kernelrelease - Output the release version string (use with make -s)'
1402 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1403 @echo ' image_name - Output the image name (use with make -s)'
2fb9b1bd 1404 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1405 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1406 echo ''
31b8cc80 1407 @echo 'Static analysers:'
1da177e4
LT
1408 @echo ' checkstack - Generate a list of stack hogs'
1409 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1410 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1411 @echo ' includecheck - Check for duplicate included header files'
295ac051 1412 @echo ' export_report - List the usages of all exported symbols'
179efcb4 1413 @echo ' headers_check - Sanity check on exported headers'
74425eee
NP
1414 @echo ' headerdep - Detect inclusion cycles in headers'
1415 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1416 @echo ''
31b8cc80 1417 @echo 'Kernel selftest:'
5a5da78b
SK
1418 @echo ' kselftest - Build and run kernel selftest (run as root)'
1419 @echo ' Build, install, and boot kernel before'
1420 @echo ' running kselftest on it'
dcb825a9 1421 @echo ' kselftest-clean - Remove all generated kselftest files'
3d6dee7a
BJZ
1422 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed'
1423 @echo ' .config.'
5a5da78b 1424 @echo ''
31b8cc80
RD
1425 @echo 'Userspace tools targets:'
1426 @echo ' use "make tools/help"'
1427 @echo ' or "cd tools; make help"'
1428 @echo ''
1da177e4 1429 @echo 'Kernel packaging:'
6c2133e1 1430 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1431 @echo ''
1432 @echo 'Documentation targets:'
cb43fb57 1433 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1da177e4 1434 @echo ''
01dee188 1435 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1436 @$(if $(archhelp),$(archhelp),\
01dee188 1437 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1438 @echo ''
1439 @$(if $(boards), \
1440 $(foreach b, $(boards), \
1441 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1442 echo '')
5dffbe81
SB
1443 @$(if $(board-dirs), \
1444 $(foreach b, $(board-dirs), \
1445 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1446 printf " %-16s - Show all of the above\\n" help-boards; \
1447 echo '')
1da177e4
LT
1448
1449 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1450 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1451 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
9ba26a72 1452 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
701842e3 1453 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
af07ce3e 1454 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
28bc20dc
SR
1455 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1456 @echo ' 1: warnings which may be relevant and do not occur too often'
1457 @echo ' 2: warnings which occur quite often but may still be relevant'
1458 @echo ' 3: more obscure warnings, can most likely be ignored'
a6de553d 1459 @echo ' Multiple levels can be combined with W=12 or W=123'
1da177e4
LT
1460 @echo ''
1461 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1462 @echo 'For further info see the ./README file'
1463
1464
5dffbe81
SB
1465help-board-dirs := $(addprefix help-,$(board-dirs))
1466
1467help-boards: $(help-board-dirs)
1468
fbae4d58 1469boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
5dffbe81
SB
1470
1471$(help-board-dirs): help-%:
1472 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1473 @$(if $(boards-per-dir), \
1474 $(foreach b, $(boards-per-dir), \
1475 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1476 echo '')
1477
1478
1da177e4
LT
1479# Documentation targets
1480# ---------------------------------------------------------------------------
62924fd7 1481DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs linkcheckdocs
22cba31b
JN
1482PHONY += $(DOC_TARGETS)
1483$(DOC_TARGETS): scripts_basic FORCE
cb43fb57 1484 $(Q)$(MAKE) $(build)=Documentation $@
1da177e4
LT
1485
1486else # KBUILD_EXTMOD
1487
1488###
1489# External module support.
1490# When building external modules the kernel used as basis is considered
1491# read-only, and no consistency checks are made and the make
1492# system is not used on the basis kernel. If updates are required
1493# in the basis kernel ordinary make commands (without M=...) must
1494# be used.
1495#
1496# The following are the only valid targets when building external
1497# modules.
1498# make M=dir clean Delete all automatically generated files
1499# make M=dir modules Make all modules in specified dir
1500# make M=dir Same as 'make M=dir modules'
1501# make M=dir modules_install
070b98bf 1502# Install the modules built in the module directory
1da177e4
LT
1503# Assumes install directory is already created
1504
1505# We are always building modules
1506KBUILD_MODULES := 1
4f193362 1507PHONY += crmodverdir
1da177e4 1508crmodverdir:
7bb9d092 1509 $(cmd_crmodverdir)
1da177e4 1510
4f193362 1511PHONY += $(objtree)/Module.symvers
1da177e4
LT
1512$(objtree)/Module.symvers:
1513 @test -e $(objtree)/Module.symvers || ( \
1514 echo; \
1515 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1516 echo " is missing; modules will have no dependencies and modversions."; \
1517 echo )
1518
1519module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1520PHONY += $(module-dirs) modules
1da177e4
LT
1521$(module-dirs): crmodverdir $(objtree)/Module.symvers
1522 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1523
1524modules: $(module-dirs)
fd54f502 1525 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1526 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1527
4f193362 1528PHONY += modules_install
a67dc21a 1529modules_install: _emodinst_ _emodinst_post
e6304663 1530
4f193362
PS
1531install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1532PHONY += _emodinst_
a67dc21a 1533_emodinst_:
a67dc21a 1534 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1535 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1536
4f193362 1537PHONY += _emodinst_post
a67dc21a
SR
1538_emodinst_post: _emodinst_
1539 $(call cmd,depmod)
1540
1da177e4
LT
1541clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1542
4f193362 1543PHONY += $(clean-dirs) clean
1da177e4
LT
1544$(clean-dirs):
1545 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1546
1547clean: rm-dirs := $(MODVERDIR)
88d7be03 1548clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1da177e4 1549
fe69b420 1550PHONY += help
1da177e4
LT
1551help:
1552 @echo ' Building external modules.'
1553 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1554 @echo ''
1555 @echo ' modules - default target, build the module(s)'
1556 @echo ' modules_install - install the module'
1557 @echo ' clean - remove generated files in module directory only'
1558 @echo ''
06300b21
SR
1559
1560# Dummies...
4f193362 1561PHONY += prepare scripts
06300b21
SR
1562prepare: ;
1563scripts: ;
1da177e4
LT
1564endif # KBUILD_EXTMOD
1565
88d7be03
MM
1566clean: $(clean-dirs)
1567 $(call cmd,rmdirs)
1568 $(call cmd,rmfiles)
43f67c98 1569 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
88d7be03 1570 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
addbcdbb 1571 -o -name '*.ko.*' \
866ced95 1572 -o -name '*.dwo' \
d523b255 1573 -o -name '*.su' \
88d7be03
MM
1574 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1575 -o -name '*.symtypes' -o -name 'modules.order' \
1576 -o -name modules.builtin -o -name '.tmp_*.o.*' \
6b90bd4b 1577 -o -name '*.c.[012]*.*' \
433db3e2 1578 -o -name '*.ll' \
88d7be03
MM
1579 -o -name '*.gcno' \) -type f -print | xargs rm -f
1580
1da177e4
LT
1581# Generate tags for editors
1582# ---------------------------------------------------------------------------
a680eedc
SR
1583quiet_cmd_tags = GEN $@
1584 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1585
f4ed1009 1586tags TAGS cscope gtags: FORCE
1da177e4
LT
1587 $(call cmd,tags)
1588
1da177e4
LT
1589# Scripts to check various things for consistency
1590# ---------------------------------------------------------------------------
1591
279f3dd3
PF
1592PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1593
1da177e4 1594includecheck:
436f876c 1595 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1596 -name '*.[hcS]' -type f -print | sort \
80007434 1597 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1598
1599versioncheck:
2ee2d292 1600 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1601 -name '*.[hcS]' -type f -print | sort \
80007434 1602 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1603
74425eee
NP
1604coccicheck:
1605 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1606
1da177e4
LT
1607namespacecheck:
1608 $(PERL) $(srctree)/scripts/namespace.pl
1609
295ac051
AB
1610export_report:
1611 $(PERL) $(srctree)/scripts/export_report.pl
1612
1da177e4
LT
1613endif #ifeq ($(config-targets),1)
1614endif #ifeq ($(mixed-targets),1)
1615
c398ff00 1616PHONY += checkstack kernelrelease kernelversion image_name
e3ccf6e3 1617
011e3a9a
JD
1618# UML needs a little special treatment here. It wants to use the host
1619# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1620# else wants $(ARCH), including people doing cross-builds, which means
1621# that $(SUBARCH) doesn't work here.
1622ifeq ($(ARCH), um)
1623CHECKSTACK_ARCH := $(SUBARCH)
1624else
1625CHECKSTACK_ARCH := $(ARCH)
1626endif
1da177e4
LT
1627checkstack:
1628 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1629 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4 1630
7b8ea53d
AW
1631kernelrelease:
1632 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
01ab1788 1633
cb58455c 1634kernelversion:
2244cbd8 1635 @echo $(KERNELVERSION)
1da177e4 1636
c398ff00
MM
1637image_name:
1638 @echo $(KBUILD_IMAGE)
1639
ea01fa9f
BP
1640# Clear a bunch of variables before executing the submake
1641tools/: FORCE
bf35182f 1642 $(Q)mkdir -p $(objtree)/tools
e572d088 1643 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
ea01fa9f
BP
1644
1645tools/%: FORCE
bf35182f 1646 $(Q)mkdir -p $(objtree)/tools
e572d088 1647 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
ea01fa9f 1648
06300b21
SR
1649# Single targets
1650# ---------------------------------------------------------------------------
bc2546a6 1651# Single targets are compatible with:
e1b8513d 1652# - build with mixed source and output
bc2546a6
SR
1653# - build with separate output dir 'make O=...'
1654# - external modules
1655#
1656# target-dir => where to store outputfile
1657# build-dir => directory in kernel source tree to use
1658
1659ifeq ($(KBUILD_EXTMOD),)
aa360879 1660 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1661 target-dir = $(dir $@)
1662else
1663 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1664 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1665 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1666endif
1667
f6ecebd6 1668%.s: %.c prepare scripts FORCE
bc2546a6 1669 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1670%.i: %.c prepare scripts FORCE
bc2546a6 1671 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1672%.o: %.c prepare scripts FORCE
bc2546a6 1673 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1674%.lst: %.c prepare scripts FORCE
bc2546a6 1675 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1676%.s: %.S prepare scripts FORCE
bc2546a6 1677 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1678%.o: %.S prepare scripts FORCE
bc2546a6 1679 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1680%.symtypes: %.c prepare scripts FORCE
1681 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
433db3e2
VT
1682%.ll: %.c prepare scripts FORCE
1683 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1684
bc2546a6 1685# Modules
31110ebb
SR
1686/: prepare scripts FORCE
1687 $(cmd_crmodverdir)
1688 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1689 $(build)=$(build-dir)
8e2faea8 1690# Make sure the latest headers are built for Documentation
ddea05fa 1691Documentation/ samples/: headers_install
31110ebb 1692%/: prepare scripts FORCE
7bb9d092 1693 $(cmd_crmodverdir)
06300b21 1694 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1695 $(build)=$(build-dir)
1696%.ko: prepare scripts FORCE
7bb9d092 1697 $(cmd_crmodverdir)
06300b21 1698 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1699 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1700 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1701
38385f8f 1702# FIXME Should go into a make.lib or something
1da177e4
LT
1703# ===========================================================================
1704
1705quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1706 cmd_rmdirs = rm -rf $(rm-dirs)
1707
1708quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1709 cmd_rmfiles = rm -f $(rm-files)
1710
bc3c26fe 1711# Run depmod only if we have System.map and depmod is executable
50a8ec31 1712quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
569658dd 1713 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
b92021b0 1714 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
50a8ec31 1715
7bb9d092 1716# Create temporary dir for module support files
ab19f879
SR
1717# clean it up only when building all modules
1718cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1719 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1da177e4 1720
1da177e4
LT
1721# read all saved command lines
1722
1723targets := $(wildcard $(sort $(targets)))
1724cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1725
1726ifneq ($(cmd_files),)
1727 $(cmd_files): ; # Do not try to update included dependency files
1728 include $(cmd_files)
1729endif
1730
1da177e4
LT
1731endif # skip-makefile
1732
4f193362 1733PHONY += FORCE
1da177e4 1734FORCE:
4f193362 1735
4f193362 1736# Declare the contents of the .PHONY variable as phony. We keep that
fe8d0a41 1737# information in a variable so we can use it in if_changed and friends.
4f193362 1738.PHONY: $(PHONY)